Cache version fetched from Github

CHANGELOG.md

@@ -20,6 +20,7 @@ Released on FIXME: date
 
 - Enhancements:
   - Improved performance regarding configuration I/O (config client is now shared in the activity context)
+  - Fetch latest version from Github once; cache previous value in the Context Storage.
 - Bugfix:
   - Fixed file format cursor position in the GUI
 

src/ui/activities/auth_activity/layout.rs

@@ -27,6 +27,7 @@
 use super::{
     AuthActivity, Context, DialogYesNoOption, FileTransferProtocol, InputField, InputForm, Popup,
 };
+use crate::ui::store::Store;
 use crate::utils::fmt::align_text_center;
 // Ext
 use std::string::ToString;
@@ -44,6 +45,7 @@ impl AuthActivity {
     /// Draw UI
     pub(super) fn draw(&mut self) {
         let mut ctx: Context = self.context.take().unwrap();
+        let store: &Store = &ctx.store;
         let _ = ctx.terminal.draw(|f| {
             // Prepare chunks
             let chunks = Layout::default()
@@ -81,7 +83,7 @@ impl AuthActivity {
                 .split(chunks[1]);
             // Draw header
             f.render_widget(self.draw_header(), auth_chunks[0]);
-            f.render_widget(self.draw_new_version(), auth_chunks[1]);
+            f.render_widget(self.draw_new_version(store), auth_chunks[1]);
             // Draw input fields
             f.render_widget(self.draw_remote_address(), auth_chunks[2]);
             f.render_widget(self.draw_remote_port(), auth_chunks[3]);
@@ -289,8 +291,8 @@ impl AuthActivity {
     /// ### draw_new_version
     ///
     /// Draw new version disclaimer
-    fn draw_new_version(&self) -> Paragraph {
-        let content: String = match self.new_version.as_ref() {
+    fn draw_new_version(&self, store: &Store) -> Paragraph {
+        let content: String = match store.get_string(super::STORE_KEY_LATEST_VERSION) {
             Some(ver) => format!("TermSCP {} is now available! Download it from <https://github.com/veeso/termscp/releases/latest>", ver),
             None => String::new(),
         };

src/ui/activities/auth_activity/mod.rs

@@ -48,6 +48,9 @@ use tui::style::Color;
 // Types
 type DialogCallback = fn(&mut AuthActivity);
 
+// Store keys
+const STORE_KEY_LATEST_VERSION: &str = "AUTH_LATEST_VERSION";
+
 /// ### InputField
 ///
 /// InputField describes the current input field to edit
@@ -115,8 +118,6 @@ pub struct AuthActivity {
     bookmarks_list: Vec<String>,   // List of bookmarks
     recents_idx: usize,            // Index of selected recent
     recents_list: Vec<String>,     // list of recents
-    // misc
-    new_version: Option<String>, // Contains new version of termscp
 }
 
 impl Default for AuthActivity {
@@ -152,7 +153,6 @@ impl AuthActivity {
             bookmarks_list: Vec::new(),
             recents_idx: 0,
             recents_list: Vec::new(),
-            new_version: None,
         }
     }
 
@@ -160,19 +160,36 @@ impl AuthActivity {
     ///
     /// If enabled in configuration, check for updates from Github
     fn check_for_updates(&mut self) {
-        if let Some(client) = self.context.as_ref().unwrap().config_client.as_ref() {
-            if client.get_check_for_updates() {
-                // Send request
-                match git::check_for_updates(env!("CARGO_PKG_VERSION")) {
-                    Ok(version) => self.new_version = version,
-                    Err(err) => {
-                        // Report error
-                        self.popup = Some(Popup::Alert(
-                            Color::Red,
-                            format!("Could not check for new updates: {}", err),
-                        ))
+        // Check version only if unset in the store
+        let ctx: &Context = self.context.as_ref().unwrap();
+        if !ctx.store.isset(STORE_KEY_LATEST_VERSION) {
+            let mut new_version: Option<String> = match ctx.config_client.as_ref() {
+                Some(client) => {
+                    if client.get_check_for_updates() {
+                        // Send request
+                        match git::check_for_updates(env!("CARGO_PKG_VERSION")) {
+                            Ok(version) => version,
+                            Err(err) => {
+                                // Report error
+                                self.popup = Some(Popup::Alert(
+                                    Color::Red,
+                                    format!("Could not check for new updates: {}", err),
+                                ));
+                                // None
+                                None
+                            }
+                        }
+                    } else {
+                        None
                     }
                 }
+                None => None,
+            };
+            let ctx: &mut Context = self.context.as_mut().unwrap();
+            // Set version into the store (or just a flag)
+            match new_version.take() {
+                Some(new_version) => ctx.store.set_string(STORE_KEY_LATEST_VERSION, new_version), // If Some, set String
+                None => ctx.store.set(STORE_KEY_LATEST_VERSION), // If None, just set flag
             }
         }
     }

src/ui/store.rs

@@ -32,6 +32,7 @@ use std::collections::HashMap;
 /// ## StoreState
 ///
 /// Store state describes a value in the store
+#[allow(dead_code)]
 enum StoreState {
     Str(String),     // String
     Signed(isize),   // Signed number
@@ -52,6 +53,7 @@ pub(crate) struct Store {
     store: HashMap<String, StoreState>,
 }
 
+#[allow(dead_code)]
 impl Store {
     /// ### init
     ///
@@ -68,11 +70,8 @@ impl Store {
     /// Get string from store
     pub fn get_string(&self, key: &str) -> Option<&str> {
         match self.store.get(key) {
-            None => None,
-            Some(val) => match val {
-                StoreState::Str(s) => Some(s.as_str()),
-                _ => None,
-            },
+            Some(StoreState::Str(s)) => Some(s.as_str()),
+            _ => None,
         }
     }
 
@@ -81,11 +80,8 @@ impl Store {
     /// Get signed from store
     pub fn get_signed(&self, key: &str) -> Option<isize> {
         match self.store.get(key) {
-            None => None,
-            Some(val) => match val {
-                StoreState::Signed(i) => Some(*i),
-                _ => None,
-            },
+            Some(StoreState::Signed(i)) => Some(*i),
+            _ => None,
         }
     }
 
@@ -94,11 +90,8 @@ impl Store {
     /// Get unsigned from store
     pub fn get_unsigned(&self, key: &str) -> Option<usize> {
         match self.store.get(key) {
-            None => None,
-            Some(val) => match val {
-                StoreState::Unsigned(u) => Some(*u),
-                _ => None,
-            },
+            Some(StoreState::Unsigned(u)) => Some(*u),
+            _ => None,
         }
     }
 
@@ -107,11 +100,8 @@ impl Store {
     /// get float from store
     pub fn get_float(&self, key: &str) -> Option<f64> {
         match self.store.get(key) {
-            None => None,
-            Some(val) => match val {
-                StoreState::Float(f) => Some(*f),
-                _ => None,
-            },
+            Some(StoreState::Float(f)) => Some(*f),
+            _ => None,
         }
     }
 
@@ -120,11 +110,8 @@ impl Store {
     /// get boolean from store
     pub fn get_boolean(&self, key: &str) -> Option<bool> {
         match self.store.get(key) {
-            None => None,
-            Some(val) => match val {
-                StoreState::Boolean(b) => Some(*b),
-                _ => None,
-            },
+            Some(StoreState::Boolean(b)) => Some(*b),
+            _ => None,
         }
     }